# data[].attributes.body
- Interatrial Septum
- Interventricular Septum
- Endocardium: innermost lining
- Myocardium: middle, muscular layer
- Pericardium: membranous sac surrounding the outside

# data[].attributes.body
- Right Atrium
- Right Ventricle
- Left Atrium
- Left Ventricle

# data[].attributes.body
- Tricuspid Valve
- Pulmonary Valve
- Mitral Valve
- Aortic Valve

# data[].attributes.body
- Arteries: blood goes AWAY from the heart, carrying oxygenated blood
- Capillaries: oxygen and nutrient exchange occurs; O₂ moves from lungs to blood, CO₂ moves from blood to lungs
- Veins: blood moves TOWARD the heart, carrying deoxygenated blood